Latching mechanism for intermittent thread-cutting temples



April 24, 1928. 1,667,466

' s. H. WILLARD LATCHING MECHANISM FOR INTERMITTENT THREAD CUTTING TEMPLES Filed Nov. 5. 1926 Invenl'or George H. Wallorck y WNW An a Patented Apr. 24, 1928.

UNITED STATES enonenrr. WILLAIti), or HoriinALE; MAssAonUsETrs, nssrenon o Deanna con- PORATION, or HoPEnALnmAssAonUsErm,1A coRPoRATIon orMunn. j

LATCI'IING MECHANISM non'rn'rnnmirrnn'r THnnAnouri'mefTEiitrLns.

i Application filed ITovember 5, 1926. Serial H0. 146,392. i

This invention relates to thread cutting temple" of the intermittently acting type such as employed in looms provided with automatic filling replenishing mechanism and in which'the thread cuttingmechanism is held in inoperativcp'osition byfa detent latch element during: the" normal operation of the loom, but is rendered operative at the time of filling replenishment so as to sever the filling ends left at theselvage as theresult of such replenishment.

Oneform of such intermittent thread ,cuttingiemple is disclosed in thefpatent Q to Stimpson, No. 135525016, September 1,

1925 Therein the rimej actuating element for effecting the movement of the detent latch to render the cutting mechanism oper-' ative is the usual shuttle feeler which moves,"

whenfillingreplenishmentis to take place 9 and the movement of this shuttle feeler act-.

ing through certain controlling mechanism] described in the said patent and located remote from the temple is transmitted through a Bowden wire to the detent latch. The

"present invention inthe specific form illustrated is disclosed in connection with such a construction. But the inventlon in ts ,v broa'der aspects is not restricted to this par ticular type of mechanism because various means maybe employed toefiect the move,- ment of the latching mechanism at thede- 1 siredtime as, for example; when filling re-"f plenishment takes place. p t 7 One ob'ect of i he presentinvention is {to cutting temple and preferably with out' al teration thereof by utilizing the usual screw employed for securing" together the capand pod of the temp-1e head: The inventionthus f renders it a comparativelysimple matter to equip existing looms prov ded withthread These and'other objectsand features'of' provide a self-contained latching mechanism which may be readily j and bodily attached 1 or secured to the head of a standardth feam ple or without" even removing vide ainovel form of'latching mechanism the invention, will appear more fully from the accompanying description and drawings and will be particularly p i t d t claims; t l

Asthe general construction and operation of various types of intermittent thread cutting temples for-looms are well known and familiar to those skilled infthe art,"and as the patent to Stimpsonabove referredto discloses in *full detail: one form of such mechanism and as the "present invention is not concerned with the particular mechanism,-einployed for initiatingthe movement ofthe latching mechanism, 'itlwill only be necessary-here to illustrate and describe a simple and preferred form of construction embodying the invention when used in connection with a controlling vmecl'ianism such as disclosed'i'n the said'Stimpson patent:-

lly ibroken In thedrawings: I Fig. 1 1s as de elevatlon partia away "of an intermittent thread cutting templewith'a preferredform of the present invention mounted thereon.

Fig.2 is a" top plan "View of theiconstruc- Ii tion shown in Fig. land partially inherizont'alcross" section on the line 2- 2."

Fig. is p a detail in side elevation withthe cover plate of the guideWay'reInOvedfi V The thread cutting templeillustrated is of: a: well'ltnown and familiar type, i The temple stand l is'secured by bolts passing through the slot 2 therein inthe usual man inert to theQbreaStKbeam I of the loom. The

temple "liead3comprises the cape a'ndpod 5"secured together'hv the screws and nut 7.

8 mounted to slidein thestand 1. v;

" The cutting mechanism illustratedycomprises afixe'd: 'cutterbladel) mounted at the front ofthetemple head and a movable cutter This headris provided with the usual shank bladelO mounted to rock and reciprocate in thete'mple head and "cooperate with :the

fined bladef This movable member-is provided with the usual depending heel 11 which',jwhen'struck byl thelay; effects the cutting movement, while the usual "spring 12 connected fat itsfupper end to'the shank Sjand' at itslower end to a stud. 13 projectg ing laterally frmnthe heel-11 effects the movement of the movable cutter meinherto rearwardprojectedfpoeitien:

The present invention is not concerned with any specific form of thread cutting temple and the construction just described is employed simply for illustration.

In the intermittent type of thread cutting temple, the thread cutting mechanism is normally held inoperative and in the construc tion illustrated, this is secured by providing the movable thread cutting member 10 with a laterally extending stud or projection which is engaged by a detent latch when the movable cutter member is in its inoperative or retracted position.

The present invention has to do with a latching mechanism which, when in latching position, renders the cutting mechanism inoperative and, when in unlatching position, renders the cutting mechanism operative. In the construction illustrated, the movement of the latch to the former position is effected by a spring and to the latter position is effected by an actuator transmitter in the form of a Bowden wire. In the construction illustrated, the Bowden ,wire may be actuated by such a construction as disclosed in the Stimpson patent referred to upon the call for filling replcnish- I ment.

One feature of the present invention is that the entire latching mechanism is embodied in a seltcontained structure adapted to be readily attached to. the head of the temple and preferably by means of the usual screw 6 which unites the cap and pod of the temple, thus enabling the mechanism to be embodied in the loom without alteration of the temple and even without removing it from the loom. Thus existing looms in use in mills'and already having thread cutting,

temples may readilybe equipped with mechanism whereby the desired intermittent op eration of the temple is provided. All that it'is necessary to do is to attach this selfcontained latching mechanism to the temple head and make the necessary connections to the actuating element. If the thread cutting mechanism is notprovided with a suitable part 'to cooperate with the latch, it may readily be supplied. If the thread cutting temple is of the type illustrated and there is no stud on the movable thread cutting memher, it is an easy matter to furnish with the, self-contained latching mechanism a new movable thread cutting member having a stud or projection such as 14, which may readily be slipped in place in lieu of the one in use;' r

The: present invention, besides providing a self-contained latching mechanism of 5 character which may be attached to the temple head, also presents a novel form oflatching mechanism, whether of the self-contained character or not. i

In the construction illustrated, a base or bracket member is provided for supporting the latching mechanism. This base comprises a. vertical portion 15 and a laterally extending projection 16 adapted to fit against and on top of the temple head and provided with an aperture fitting over the screw 6 so that by means of the screw 6 and nut 7, without alteration of the temple, this base may be firmly secured in position. The portion 15 of the base is provided with a vertical guideway 17 formed by the vertical flanges 18. The dctent latch 19 is formed on a slide 20 mounted to slide vertically in the guideway 16. A helical spring21 located in a slot in the/slide 20abuts at its lower end against the slide and at its upper end against a lug 22 projecting from the base and thus acts normally to move the slide and detent latch downward. In the construction illustrated, a cover plate 23 is secured by screw at over the guideway 17. This cover plate at its lower end has a vertically apertured boss presenting a connection to receive the actuation transmitter, or in this case the upper end of the Bowden wire 25, by means of which the detent latch is movedwto its upper or unlatching position. The upper end of the Bowden wire is shown as locked in place by a set screw26, preferably by meansv of an interposed thimble 27. In the construction illustrated, the movable element 28, of the Bowden wire engages and acts through a plunger 29 mounted for V61? tical movement in the cover plate 23 and cooperating with a projection 30extending forwardly from the slide 20 through a slot 31 in the cover plate.

It will thus be seen that the plunger 29,

ticularly adapted foruse when applied to i 4 the temple head.

Having thus described the invention,

what is claimed as new, and desired to be secured by Letters Patent, is:

1. A self-contained.latching mechanism for an intermittent thread cutting temple, the head of whichpresents a cap and a pod united by a screw, which mechanism comprises a base, a. latching mechanism for controlling the operative and inoperative posi;

tion of the cutting mechanism carried by and mounted. on said base, and a projection 7 from the base fitting against the temple head and around said screw, the said screw when in place acting to clamp the projection to comprising a base, means for securing the base to the temple head, a guideway onvthe base, a detent latch mounted to slide on the guideway, means acting to slide the latch into latching position, and a connection on the base to receive an actuation transmitter by means of which the detent latch is slid into unlatching position when the cutting action. is required.

3. A latching mechanism for an intermittent thread cutting temple comprising a base,

means for securing the base to the temple, 8. guideway on the base, a detent latch mountedto slide on theguideway between latching positiomwhich renders the cutting mechanism inoperative, and unlatching position, which renders the cutting mechanism operative, vmeans mounted on the base acting to slide the detent latch between the a,

said positions as and when required to effect the intermittent'operation of the thread cutting mechanism; l .e a

4. A latching mechanism for an intermittent thread cutting temple comprising a base, means for securing the base to the temple,

(8, vertical guideway 0n vthe base, a detent latch mounted to slide onthe guideway, yielding means actingto slide the, detent latch downward on the guideway into latching position, and means, actuated when the cutting action is required, to slide the detent latch" upward into unlatching position.

In testimony whereof, I have signed my name to this specification.

GEORGE WILLARD, 

